Button setTitleAlignment什么意思？

Cocos2d-x
#1

auto btn = Button::create(“img/btn.png”);
btn->setScale9Enabled(true);
btn->setContentSize(Size(400, 70));
btn->setTitleFontName(g_sFontPath);
btn->setTitleAlignment(TextHAlignment::LEFT, TextVAlignment::CENTER);
btn->setTitleFontSize(28);
btn->setTitleText(“xxx”);
…

这接口不能用啊，还是居中显示

#2

问的这些问题感觉自己跟智障一样，还是手动往Button里塞个Label吧